METHOD OF MOUNTING IMZH-500 RAILROAD BRIDGE WITH COLLAPSIBLE RAILWAY CANTILEVER CRANE FOR INSTALLATION OF SUPPORT AND SPANS IN ONE PROCESS CYCLE Russian patent published in 2021 - IPC E01D21/00 

FIELD: construction.

SUBSTANCE: invention relates to military bridge construction and can be used in designing and manufacturing of equipment for mounting railroad metal racks, as well as assembling and operating bridges and overpasses from inventory property of collapsible metal viaducts. Installation of all structural elements of flyover overpass in one cycle of operation of cantilever crane is provided by simultaneous delivery from mounting platform to assembly site of support, suspended scaffolding and span structures, as well as equipping the crane with equipment and mechanisms for mounting said structural elements. Superstructure with top mounting racks attached to it is loaded onto the crane central platform having side walls in the form of a truss and a rear mesh frame wall providing stiffness and unchangeability of the support structure of the cantilever crane. In order to enable loading of structural elements on platform and their installation, front part of central platform is open. Length of central platform is shortened compared to span length by half of length of cargo support trolley. Cantilever crane boom consisting of central section connected in one design, main cantilever and counterweight cantilever is secured to central platform top part. Said boom is equipped with main tackle, counterweight pulleys and cargo trolley with two tackles to displace inside boom. On the console of the central platform there installed is electric unit feeding electric equipment of cantilever crane. Counterweight is moved to working position before loading, transportation and erection of ramp structures. When moving and stopping the valve without load, the counterweight is carried and stands on the platform. Movement of cantilever crane is provided by truck-tractor on combined stroke. Tractor is coupled by couplers via counterweight platform with central platform. Technology of mounting bridge-trestle with flat channel supports on water in general form consists of the following operations: loading in mounting dead-end on central platform of cantilever crane span structure with suspension hinges fixed on it, suspension for the main cantilever on the flat support bed polyspast and front lining polyspast of the flat bed support; feeding to mounting point of cantilever crane with structural elements of next flight of trestle bridge; installation of the main pulleys support in the design position to the watercourse bottom; delivery of cargo trolleys with tackle trucks to design position of suspended scaffolding with fixation of installed support to installed support; immersion by pouring installation of piles, standing on pontoon, screw piles of flat channel support to design depth to design failure; feeding and installation in design position of tackle truck by way of tackle; feeding the cantilever crane into the mounting dead end for loading structural elements of the next span of the trestle bridge.

EFFECT: proposed design solution of collapsible railway cantilever crane for installation of support and span in one technological cycle allows increasing speed of railway bridges restoration in case of their destruction.

1 cl, 4 dwg